Self-service surgical retractor

ABSTRACT

A new self-service surgical retractor with the characteristics comprising: main post ( 1 ), lock sleeve ( 7 ), lock operating lever ( 11 ), take-up device lock sleeve ( 15 ), take-up device ( 17 ) and hook plate ( 22 ). The lock sleeve ( 7 ) is covered on the lower part of the main post ( 1 ) to form a dovetail groove; the lock operating lever ( 11 ) is spun on the main post ( 1 ) through the thread; the take-up device lock sleeve ( 15 ) is spun on the upper part of the main post ( 1 ) and locks and fixes the inserted link ( 18 ) of the take-up device ( 17 ) on the upper end of the main post ( 1 ); the take-up device ( 17 ) is connected with the hook plate ( 22 ) through the retraction tape or rope ( 21 ). With simple structure and low cost, the present invention is easy to manufacture and use.

CROSS REFERENCE TO RELATED PATENT APPLICATION

The present application is the US national stage of PCT/CN2011/070922filed on Feb. 11, 2011, which claims the priority of the Chinese patentapplication No. 201010584868.2 filed on Dec. 13, 2010, which applicationis incorporated herein by reference.This application is a reissueapplication of U.S. patent application Ser. No. 13/520,085, filed onJun. 29, 2012, which issued as U.S. Pat. No. 8,480,573 on Jul. 9, 2013,which is the US national stage of PCT/CN2011/070922 filed on Feb. 11,2011, which claims the priority of the Chinese patent application No.201010584868.2 filed on Dec. 13, 2010, and all of which applications areincorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates to a medical device, especially aretractor that is used in the surgery and can retract the incisioninstead of manual traction in surgery, so that the surgical field can befully exposed, specifically a new self-service surgical retractorapplicable to a variety of surgeries.

BACKGROUND OF THE INVENTION

At present, the opened abdomen is required to maintain a good retractionstate in order to obtain a desired surgical field during the straightabdominal incision surgery, such as general surgery, urology surgery,and obstetrics and gynecology; similarly, the incision shall also beretracted in chest, back spine and other surgeries. In one of theexisting methods, the incision is opened by the surgical assistant withhooks from both sides, with poor effect and labor consumed. To this end,a variety of abdominal surgical retractors have been invented in lieu ofmanual traction to release people from heavy manual labor, which havemade good using effects. For example, Chinese Patent No. 2006100980378,2008101951371 and other patents are retractors specially designed forabdominal surgeries. However, during actual use, such kinds ofretractors shall support multiple stayed poles connecting drag hooks onthe same mounting bracket and the expansion amount of the stayed polesshall be adjusted to retract the hook plate, so the stayed poles stretchout of the surgical bed in the surgery, occupying the limited spacebeside the surgical bed and seriously affecting the doctors' standingposition. The stayed poles stretching out of the surgical bed are alsolikely to cause pollution. Therefore, the positions of the existingtypes of retractors are constant in use to avoid the stayed polesstretching out of the surgical bed from affecting the doctors' standingposition and the applicability is limited; for example, the upperabdominal retractor can only be installed above the bed head fortransverse incision under the costal margin of the upper abdomen anddifficult for most straight incisions and lower abdominal surgeries;while the lower abdominal retractor is very difficult to adapt to upperabdominal surgeries and even unable to adapt to the surgical retractionof other parts. Therefore, a type of convenient and effective retractorsthat can be moved arbitrarily beside the surgical bed as required andcan retract a variety of surgical incisions without affecting thedoctors' standing position with the stayed poles not stretching out ofthe bed when pulling the hook plate are required in clinicalapplication. The existing various types of retractors are not qualifiedfor above requirements. These existing retractors have a common problem,namely, large size, large quantity of parts needing on-site assembly,cumbersome use steps and high manufacturing costs, which shall beresolved. Meanwhile, the fixing devices of the existing lifting pokerare also of complex structure, high manufacturing difficulty andespecially inconvenient operation. In this case, the medical personnelmust adjust the height with the assistance of assistants simultaneouslyduring locking, otherwise the lifting pokers are not able to be fixed onthe bedside and the height is difficult to adjust; in addition, thelifting pokers can not be easily adjusted as required during operationand will shake after being stressed due to the inconsistent width of thelock slot and bedside. To this end, the applicant has designed a patentof invention named “self-service surgical retractor” with theapplication number of 2010102889303, better solving the above problems.However in actual use, the applicant discovered that there are a seriesof problems in above patent: for example, the mobile dovetail block ofthe column locking mechanism shall be moved up manually and can not moveup and down with the lifting poker synchronously; the take-up mechanismis more complex and the inserted link of the take-up mechanism is oflarge inserting resistance due to air closure.

SUMMARY OF THE INVENTION

The present invention is aimed to design a new self-service surgicalretractor with simple structure, small size, simple structure of columnfixed device, convenient, stable and reliable operation and applicableto the retraction of any part without affecting the doctors' standingposition for the inconvenient operation and complex structure of theexisting retractors.

The technical scheme of the present invention is as follows:

A new self-service surgical retractor with the characteristicsincluding:

-   -   Main post 1, the lower end of the main post 1 is equipped with a        half of dovetail groove 2 matched with the surgical bedside and        the upper end is equipped with external thread 3 and a jack 4.        The upper end of the said external thread 3 is of conical        structure 5 and has an opening 6 along the axial direction;    -   Lock sleeve 7, the lock sleeve 7 is set on the main post 1. The        lower end of the lock sleeve 7 is equipped with the other half        of the dovetail groove 8 that can move up and down, and the said        the other half of the dovetail groove 8 that can move up and        down constitutes a complete dovetail groove connected with the        surgical bedside with the half of dovetail groove 2; on the        inner wall of the lock sleeve 7 an axial guide groove 9 is        equipped, which is matched with the anti-rotation convex 10 on        the lower end of the main post 1, so that the lock sleeve 7 can        only move up and down along the main post 1;    -   Lock operating lever 11, the upper end of the lock operating        lever 11 is equipped with the internal thread 12 matched with        the external thread 3 on the upper end of the main post 1 and        the lower end of the lock operating lever 11 is equipped with a        circular groove 13, which is matched with the circular convex 14        on the upper end of the lock sleeve 7, so that the lock        operating lever 11 is connected with the lock sleeve 7 and can        drive the lock sleeve 7 to move up and down along the main post        1 with the lock operating lever 11;    -   Take-up device lock sleeve 15, the upper end of the take-up        device lock sleeve 15 is equipped with the internal thread 16        matched with the external thread 3 on the upper end of the main        post 1 and the lower end of the take-up device lock sleeve 15 is        covered on the upper end of the lock operating lever 11;    -   Take-up device 17, the lower end of the take-up device 17 is        equipped with an inserted link 18 that is inserted in the jack 4        on the upper end of the main post 1 and the height of the        take-up device 17 can be adjusted by adjusting the position of        the inserted link 18 in the jack 4; the upper end of the take-up        device 17 is equipped with a take-up box 19, in which a take-up        spool 20 is installed. Both ends of the take-up spool 20 stretch        out of the take-up box 19, one of which acts as take-down press        end and the other acts as take-up driving end; one end of the        traction tape or rope 21 is fixed on the take-up spool 20 and        the other end is connected with the hook plate 22 through the        opening on the take-up box 19; on the said take-up box 19 the        toothed sleeve 23 is fixed, the end face of the toothed sleeve        is set with one-way gear; the said take-up spool 20 is also        equipped with the one-way gear column 24, which is set with        one-way gear on the end face, matched with the toothed sleeve 23        and can only rotate in one-way after engaged with the toothed        sleeve 23; one end of the one-way gear column 24 abuts on one        end of the spring 25, which always pushes the one-way gear        column 24 to the toothed sleeve 23 and the other end of the        spring abuts on the inner wall of the take-up box 19; the said        spring 25 is cased on the take-up spool 20; the said take-up        spool 20 is installed in the toothed sleeve 23;    -   Hook plate 22, the hook plate 22 is connected with the traction        tape or rope 21 and is equipped with a hook head 26 used to hook        the human tissue or abdominal wall.

The said circular convex 14 is the continuous convex ring or the convexring composed of at least two sections of convexes.

The take-up driving end of the said take-up spool 20 is the polygon oredge circular pile structure.

One end of the said traction tape or rope 21 is connected with theone-way gear column 24 and the other end is equipped with a guide pin 32inserted into the guide groove 27 on the hook plate 22 so as to achievedetachable connection with the hook plate 22. The width of the insertend of the guide groove 27 on the said hook plate 22 is larger than thewidth of the positioning end to facilitate the insertion of the guidepin 32.

The said traction tape or rope 21 can be made of a variety of materials,such as nylon textile tape or rope, plastic braid or rope or metalflexible rope.

The said take-up box 19 is covered with an upper cover 28.

On the surface of the said inserted link 18 is opened with axial airdischarge duct 30. In some embodiments, the axial air discharge duct 30connects a closed space defined by the interior surface of the jack 3and the exterior surface of the first end of the take-up device 17. Thesaid hook plate 22 is equipped with the shrinkage pool 29 matched withthe take-up driving end on the take-up spool 20.

Beneficial effects of the present invention:

With simple structure and small size, the present invention is easy tooperate and fits the operating habits of doctors with the space occupiedonly of the location of the lifting poker. The surgical incision can beeffectively retracted without affecting the standing position andoperation of the surgeons after the lifting poker is adjusted to theproper height.

The traction tape or rope of the present invention can be placed in thetake-up box of the take-up device without occupying the space beside thesurgical bed, so that the retractor can be used in any positionaccording to actual needs without bringing any inconvenience to doctors.

The present invention can be used for the retraction of the surgicalincision in any part outside the human skull, especially suitable forthe retraction of the incisions with vertical angle.

Due to the use of dovetail groove structure with adjustable width in thepresent invention, the locking mechanism on the lower end of the liftingpoker can be completely matched with the bedside and will not shakeafter being stressed during use, solving the stability problem in usefundamentally.

The present invention completely uses the thread structure to achievelocking and loosening, and the connection between the lower end of thelifting poker and the bedside as well as the height adjustment of theupper end can be carried out separately, so that the doctors can achievethe locking (or loosening) of the lower end and the locking (orloosening) of the stay bar only by twisting different rotation sets; inparticular, the adjustment of the dovetail block opening size dependsentirely on the rotation of the lock operating lever, overcoming theproblem that the existing lock sleeve can only move towards onedirection, that is, the narrow direction without moving up with therotation of the lock operating lever. Therefore, the adjustment of theopening size of the dovetail groove can be achieved only with oneoperation, reducing the inconvenient operation of the medical personnel.

Without convex pieces, the present invention will not affect theambulation of the medical personnel during operation, making thesurgical environment clean and orderly.

The present invention adopts medical engineering plastics for injectionmolding to achieve mass production, so as to help reduce surgical costsas well as achieve one-time use due to low costs and reduce theoccurrence of cross-infection events that may be caused by traditionalreuse.

The present invention can be used for fixed surgical retractors, such asabdomen, chest and back retractors, and can be also used in otheroccasions in which the height of the medical devices need to be adjustedon the hospital bed.

The take-up device of the present invention adopts the principle ofone-way meshing tooth with very simple structure. The take-up can beachieved only by separating the two meshing teeth, which can be reachedonly pressing the take-up spool during operation; once the take-up spoolis released, the mutual meshing teeth will only move towards the take-updirection, so the traction tape or rope will not stretch till up to anappropriate location, ensuring the reliability of positioning. Fortake-up, the traction tape or rope can be withdrawn to the take-up boxby only rotating the take-up spool along the rotatable direction of theone-way tooth. In addition, the present invention creatively uses thehook plate as the operating handle to operate the take-up spool and setsthe operating hole on the hook plate in one end of the take-up spoolstretching out of the take-up box. In this case, the traction tape orrope can be withdrawn to the take-up box by only rotating the hookplate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structure diagram of the present invention.

FIG. 2 is a side elevation of FIG. 1.

FIG. 3 is a structure diagram of the main post in the present invention.

FIG. 4 is a structure diagram of the hook plate in the presentinvention.

FIG. 5 is a partial (I) enlarged drawing of FIG. 1.

DETAIL DESCRIPTION OF THE INVENTION

Next, let me give further explanation for the present invention based onthe drawings and embodiments.

As shown in FIG. 1-4.

A new self-service surgical retractor, mainly composed of main post 1,lock sleeve 7, lock operating lever 11, take-up device lock sleeve 15,take-up device 17, traction tape or rope 21 and hook plate 22, as shownin FIG. 1 and FIG. 2. The lower end of the main post 1 is equipped witha half of dovetail groove 2 matched with the surgical bedside, and theupper end is equipped with the external thread 3 and a jack 4. The upperend of the said external thread 3 is of conical structure 5 and has anopening 6 along the axial direction, as shown in FIG. 3. The lock sleeve7 is set on the main post 1 and connected with the lower end of the lockoperating lever 11 rotatablely; the lower end of the lock sleeve 7 isequipped with the other half of the dovetail groove 8 that can move upand down, and the said the other half of the dovetail groove 8 that canmove up and down constitutes a complete dovetail groove connected withthe surgical bedside with the half of dovetail groove 2; on the innerwall of the lock sleeve 7 one or multiple axial guide grooves 9 isequipped, which are matched with the anti-rotation convex 10 on thelower end of the main post 1, so that the lock sleeve 7 can only move upand down along the main post 1; the anti-rotation convex 10 can besubject to injection molding with the main post 1 and also can beinstalled additionally with the number of one or more; the upper end ofthe lock operating lever 11 is equipped with the internal thread 12matched with the external thread 3 on the upper end of the main post 1,and the upper end of the main post 1 shall stretch out of the lockoperating lever 11 so as to match with the inner thread of the take-updevice lock sleeve 15; the lower end of the lock operating lever 11 isequipped with a circular groove 13, which is matched with the circularconvex 14 on the upper end of the lock sleeve 7 (as shown in FIG. 5), sothat the lock operating lever 11 is connected with the lock sleeve 7 andcan drive the lock sleeve 7 to move up and down along the main post 1with the lock operating lever 11; the circular convex 14 can be acontinuous integral structure and can also be a circular structurecomposed of several sections of gaps. The upper end of the take-updevice lock sleeve 15 is equipped with the internal thread 16 matchedwith the external thread 3 on the upper end of the main post 1, and thelower end of the take-up device lock sleeve 15 is covered on the upperend of the lock operating lever 11; the upper end of the main post 1 isof conical structure 5 and has the opening 6 for tightening, so theopening on the upper end of the main post 1 shrinks when rotating thetake-up device lock sleeve 15, thereby gripping the inserted linkinserted in the take-up device 17 in the jack on the upper end of themain post 1 for irremovability and achieving the positioning andadjustment in the height direction. The lower end of the take-up device17 is equipped with an inserted link 18 that is inserted in the jack 4on the upper end of the main post 1 and the height of the take-up device17 can be adjusted by adjusting the position of the inserted link 18 inthe jack 4; on the surface of the inserted link 18 axial air dischargeduct 30 is opened in order to facilitate the insertion of the insertedlink 18 into the jack on the upper end of the main post 1; the upper endof the take-up device 17 is equipped with a take-up box 19, in which atake-up spool 20 is installed. Both ends of the take-up spool 20 stretchout of the take-up box 19, one of which acts as take-down press end(button sleeves that can increase the contact area for operation can beinstalled on the press end) and the other acts as take-up driving end(the driving end can be of polygon or edge circular pile structurematched with the socket spanner, can use the socket spanner foroperation and can also directly use the hook plate of the presentinvention as the operating wrench simply by indicating the shrinkagepool matched with the appearance of the driving end on the hook plate);one end of the traction tape or rope 21 (nylon textile tape or rope,plastic braid or rope or metal flexible rope and the tape or rope withother types of materials can be used) is fixed on the take-up spool 20and the other end is connected with the hook plate 22 through theopening on the take-up box 19; on the said take-up box 19 the toothedsleeve 23 is fixed, the end face of the toothed sleeve 23 is set withone-way gear; the said take-up spool 20 is also equipped with theone-way gear column 24, which is set with one-way gear on the end face,matched with the toothed sleeve 23 and can only rotate in one-way afterengaged with the toothed sleeve 23; one end of the one-way gear column24 abuts on one end of the spring 25 which always pushes the one-waygear column 24 to the toothed sleeve 23, and the other end of the springabuts on the inner wall of the take-up box 19; the said spring 25 iscased on the take-up spool 20; the said take-up spool 20 is installed inthe toothed sleeve 23; one end of the retraction tape or rope 21 isconnected with the one-way gear column 24 on the take-up spool 20 andthe other end is equipped with a guide pin 32 inserted into the guidegroove 27 on the hook plate 22, so as to achieve detachable connectionwith the hook plate 22. The width of the insert end of the guide groove27 on the said hook plate 22 is larger than the width of the positioningend to facilitate the insertion of the guide pin 32. The hook plate 22is connected with the traction tape or rope 21 and is equipped with ahook head 26 used to hook the human tissue or abdominal wall. Meanwhile,to play the role of wrench, the shrinkage pool 29 can be dug in suitablelocation of the hook plate 22 (at the location where the wall thicknessis greater) instead of the socket spanner for take-up operation, asshown in FIG. 4.

Various parts of the present invention can be made of stainless steeland can also be made of medical engineering plastics. From theperspective of one-time use and cost reduction, it is better to use themedical engineering plastics with injection molding, which is not onlywith quality guaranteed, but also with low manufacturing cost.

The working process of the present invention is as follows:

1. Installation of Lifting Device

First rotate the lock operating lever 11 to make the opening of thedovetail groove larger than the thickness of the fixed slide rail besidethe surgical bed, and then insert the dovetail groove directed at thebedside, then rotate the lock operating lever 11 and move the locksleeve 7 down. The lock sleeve 7 can only move in axial linear directionrather than rotate with the lock operating lever 11 under the action ofthe anti-rotation convex 10 until the lock sleeve 7 clenches with thesurgical bedside and the lock operating lever 11 can not rotate, therebycompleting the locking connection with the bedside.

Then, release the take-up device lock sleeve 15; at this time, the upperend of the main post 1 is not subject to force, so that the open slot onit is stretched and the inserted link 18 can be easily drawn out fromthe main post 1; rotate the take-up device lock sleeve 15 again when theinserted link 18 is drawn out to the set height and then the take-updevice lock sleeve 15 narrows the opening on the upper end of the mainpost 1 and holds tightly in the inserted link 18 and next tighten thetake-up device lock sleeve 15. The removal process is just the opposite.

2. Take-Down Process:

Press the button on one end of the take-up spool 20 stretching out ofthe take-up box 19 and overcome the elasticity of the spring 25, and thetake-up spool 20 will move so that the originally meshing one-way fluteddisks are separated; since the take-up spool 20 is unconstrained at thistime, just pull the retraction tape or rope 21 to pull out the beltoriginally wrapped around the take-up spool 20 and then release thebutton after pulling out to an appropriate location; the one-way fluteddisks are meshed with each other at this time and are fixed at the setlength since the toothed sleeve 23 is fixed on the take-up box andcannot rotate and the one-way gear column 24 on the take-up spool 20 cannot cross the toothed sleeve 23 (that is, the take-up spool 20 in FIG. 2cannot rotate counterclockwise).

3. Take-Up Process:

The retraction tape or rope can be placed in the take-up box 19 only bycovering the shrinkage pool 29 which is on the socket spanner or hookplate 22 on the driving end on the take-up spool 20 to rotate thetake-up spool 20 (clockwise rotation in FIG. 2).

4. Hooking of hook plate 22:

Only insert the guide pin outside the retraction tape or rope 21 in theguide groove 27 on the surface of the hook plate 22, and the guide pin32 will not be pulled out of the hook plate 22 under the constraints ofthe bottom of the guide groove 27 and the gravity or tension. Simplypull the guide pin and take out the guide pin 32 reversely to take outit.

It can be seen from the embodiments that the key of the presentinvention is that a single surgeon can complete the assembly of thelifting device and the tightening of the retraction tape or rope withoutthe help of assistants and the invention will not affect the activitiesand surgeries of doctors with the overall straight-bar structure. Ifrequired, the adjustment during the surgery can be completelyaccomplished by one person, thereby reducing the number of auxiliarypersons in the surgery.

The part uncovered in the present invention is the same with theexisting technology or can be achieved by means of the existingtechnology.

What is claimed is:
 1. A self-service surgical retractor comprising:Maina main post (1)having an upper end and a lower end, wherein thelower end of the main post (1) is equipped with a first half of adovetail groove (2) matched with the a surgical bedside and the upperend of the main post is equipped with an external thread (3) and a jack(4); The upper end of and wherein the said external thread (3) is ofconical structure (5) and has an opening (6) along the axial direction;Locka lock sleeve (7)having an upper end and a lower end, wherein: thelock sleeve (7) is set on the said main post (1); The the lower end ofthe lock sleeve (7) is equipped with the other a second half of thedovetail groove (8) that can move up and down and the said, wherein theother second half of the dovetail groove (8) that can move up and down,together with the first half of the dovetail groove, constitutes acomplete dovetail groove connected with the surgical bedside with thehalf of dovetail groove (2); wherein, on the an inner wall of the locksleeve (7) an axial guide groove (9) is equipped, which is matched withthe an anti-rotation convex (10) on the lower end of the main post (1),so that the lock sleeve (7) can only move up and down along the mainpost (1); Locka lock operating lever (11)having an upper end and a lowerend, wherein the upper end of the lock operating lever (11) is equippedwith the an internal thread (12) matched with the external thread (3) onthe upper end of the main post (1) and the lower end of the lockoperating lever (11) is equipped with a circular groove (13), which ismatched with the a circular convex (14) on the upper end of the locksleeve (7), so that the lock operating lever (11) is connected with thelock sleeve (7) and can drive the lock sleeve (7) to move up and downalong the main post (1) with the lock operating lever (11); Take-upatake-up device lock sleeve (15)having an upper end and a lower end,wherein the upper end of the take-up device lock sleeve (15) is equippedwith the internal thread (16) matched with the external thread (3) onthe upper end of the main post (1) and the lower end of the take-updevice lock sleeve (15) is covered on the upper end of the lockoperating lever (11); a hook plate, wherein the hook plate is connectedwith traction tape or rope and is equipped with a hook head used to hookhuman tissue or an abdominal wall; and Take-upa take-up device(17)having an upper end and a lower end, wherein the lower end of thetake-up device (17) is equipped with an inserted link (18) that isinserted in the jack (4) on the upper end of the main post (1) and theheight of the take-up device (17) can be adjusted by adjusting theposition of the inserted link (18) in the jack (4); the upper end of thetake-up device (17) is equipped with a take-up box (19), in which atake-up spool (20) is installed; Both both ends of the take-up spool(20) stretch out of the take-up box (19), one of which acts as atake-down press end and the other acts as a take-up driving end; one endof the traction tape or rope (21) is fixed on the take-up spool (20) andthe other end is connected with the hook plate (22) through the anopening on the take-up box (19); on the said take-up box (19) the atoothed sleeve (23) is fixed, the end face of the toothed sleeve is setwith a one-way gear; the said take-up spool (20) is also equipped with athe one-way gear column (24), which is set with the one-way gear on theend face matched with the toothed sleeve (23) and can only rotate inone-way after engaged with the toothed sleeve (23); one end of theone-way gear column (24) abuts on one end of the a spring (25) whichalways pushes the one-way gear column (24) to the toothed sleeve (23)and the other end of the spring abuts on the inner wall of the take-upbox (19); the said spring (25) is cased on the take-up spool (20); thesaid take-up spool (20) is installed in the toothed sleeve (23); Hookplate (22), the hook plate (22) is connected with the traction tape orrope (21) and is equipped with a hook head (26) used to hook the humantissue or abdominal wall.
 2. The self-service surgical retractor ofclaim 1, the characteristic of the said new self-service surgicalretractor is that the said wherein the circular convex (14) is the acontinuous convex ring or the a convex ring composed of at least twosections of convexes.
 3. The self-service surgical retractor of claim 2,the characteristic of the said new self-service surgical retractor isthat wherein the take-up driving end of the said take-up spool (20) isthe a polygon or edge circular pile structure.
 4. The self-servicesurgical retractor of claim 1, the characteristic of the said newself-service surgical retractor is that one end of the said tractiontape or rope (21) is connected with the one-way gear column (24) on thetake-up spool (25), and the other end is equipped with a guide pininserted into the guide groove (27) on the hook plate (22) so as toachieve detachable connection with the hook plate (22); The width of theinsert end of the guide groove (27) on the said hook plate (22) islarger than the width of the positioning end to facilitate the insertionof the guide pin.
 5. The self-service surgical retractor of claim 1, thecharacteristic of the said new self-service surgical retractor is thatthe said wherein the traction tape or rope (21) can be is made of nylontextile tape or rope, plastic braid or rope or metal flexible rope. 6.The self-service surgical retractor of claim 1, the characteristic ofthe said new self-service surgical retractor is that the said whereinthe take-up box (19) is covered with an upper cover (28).
 7. Theself-service surgical retractor of claim 1, the characteristic of thesaid new self-service surgical retractor is that on wherein the surfaceof the said inserted link (18) is opened with an axial air dischargeduct.
 8. The self-service surgical retractor of claim 1, thecharacteristic of the said new self-service surgical retractor is thatthe said wherein the hook plate (22) is equipped with the shrinkage pool(29) an indentation matched with the take-up driving end on the take-upspool (20).
 9. A self-service surgical retractor comprising: a main posthaving a first end and an opposite second end, wherein the main post isequipped with a mounting mechanism near the first end to mount the mainpost to a surgical bed and a supporting mechanism near the second end; atake-up device having a first end and an opposite second end, whereinthe first end of the take-up device is configured to rotatably engagethe supporting mechanism near the second end of the main post such thatthe take-up device is configured to move in both first and seconddirections along an axis of the main post; a take-up device lock sleeve,wherein the take-up device lock sleeve is configured to lock the take-updevice onto the main post when the take-up device lock sleeve moves inthe first direction along the axis of the main post and release thetake-up device from the main post when the take-up device lock sleevemoves in the second direction along the axis of the main post; a take-upbox mounted near the second end of the take-up device, wherein thetake-up box is equipped with a retractable mechanism and a lockmechanism for locking/unlocking the retractable mechanism; and a hookplate that is connected to the retractable mechanism, wherein the hookplate is equipped with a hook head used to hook the human tissue orabdominal wall.
 10. The self-service surgical retractor of claim 9,wherein the mounting mechanism of the main post is equipped with anadjustable dovetail groove for engaging a sidebar of the surgical bed.11. The self-service surgical retractor of claim 10, wherein themounting mechanism of the main post further includes a lock sleeve forforming a half of the adjustable dovetail groove.
 12. The self-servicesurgical retractor of claim 11, wherein the lock sleeve is configured toengage the main post via an anti-rotation convex and a lock operatinglever via a circular convex, respectively, such that a rotation movementof the lock operating lever along the axis of the main post results in atranslation movement of the lock sleeve along the axis of the main postso as to adjust the width of the adjustable dovetail groove.
 13. Theself-service surgical retractor of claim 9, wherein the supportingmechanism of the main post is equipped with a jack at the second end forhosting the first end of the take-up device and an external thread nearthe second end for engaging the take-up device lock sleeve.
 14. Theself-service surgical retractor of claim 13, wherein the take-up devicelock sleeve is equipped with an internal thread for engaging theexternal thread near the second end of the main post such that aclockwise rotation movement of the take-up device lock sleeve along theaxis of the main post presses an interior surface of the jack against anexterior surface of the first end of the take-up device and acounter-clockwise rotation movement of the take-up device lock sleevealong the axis of the main post releases the interior surface of thejack from the exterior surface of the first end of the take-up device.15. The self-service surgical retractor of claim 14, wherein the take-updevice is equipped with an axial air discharge duct connecting a closedspace defined by the interior surface of the jack and the exteriorsurface of the first end of the take-up device.
 16. The self-servicesurgical retractor of claim 15, wherein the retractable mechanism of thetake-up box is equipped with a spring wrapping around the axis of thetake-up spool with one end fixed onto the take-up spool and another endfixed onto the take-up box to draw the hook plate closer to the take-upbox.
 17. The self-service surgical retractor of claim 16, wherein thelock mechanism includes a toothed sleeve mounted on the take-up box, thetoothed sleeve including a one-way gear surface facing a one-way gearcolumn mounted near a first end of the take-up spool, and a pressure bythe spring causes the one-way gear column to engage the one-way gearsurface into a locked state and a counter-pressure against the spring'spressure causes the one-way gear column to disengage the one-way gearsurface such that the hook plate can be pulled away from the take-upbox.
 18. The self-service surgical retractor of claim 17, wherein thetake-up box is equipped with a tightening mechanism for rotating theone-way gear column and the spring around the axis of the take-up spoolwhile the one-way gear column is engaged with the toothed sleeve by thespring's pressure.
 19. The self-service surgical retractor of claim 9,wherein the retractable mechanism of the take-up box is equipped with atake-up spool and a traction rope wraps around an axis of the take-upspool with one end fixed onto the take-up spool and another endconnected to the hook plate through an opening on the take-up box. 20.The self-service surgical retractor of claim 19, wherein the tractionrope is equipped with a guide pin that is detachably inserted into aguide groove on the hook plate.